For my high school physics class we made roller coasters out of card stock with various loops and funnels. We then had multiple questions to answer. I couldn't seem to figure this one out.
Why does the power have to be found at the bottom of the loop? Explain in terms of both energy and velocity.
Work=Force*Distance or the change in kinetic energy
The Attempt at a Solution
I figured that the conversion from kinetic energy (at the bottom of the loop) to potential energy (at the top of the loop) could have an affect on the power. But I was not sure about how velocity played a part. I also know that gravity is constantly pulling down on the marble and force normal is keep it on the track, but like before I didn't know how to incorporate it.